US 8,942,496 B2Granted

Image processing apparatus and image processing method

AssigneeSharp Kabushiki Kaisha

InventorsYoshitaka Seki, Masayuki Yamaguchi

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Abstract

Provided is an image processing apparatus capable of simultaneous reduction in memory capacity and compressibility error. An output image data generating means 11 generates processed image data based on specific reference data and preprocessed image data. Reference data generating means 5 repeatedly executes an identical processing in one term made up of not less than two consecutive frames. When an object frame is a top frame in the term, restored reference data generated by data expanding means 15 is outputted as data expanding means. When the object frame is a second or subsequent frame in the term, simulated specific reference data is generated based on the restored reference data generated by the data expanding means 15 and preprocessed image data of the object frame, and outputted as specific reference data. When the object frame is a final frame in the term, in addition to the above operation, the reference data is generated based on the specific reference data and preprocessed image data of the object frame, and outputted to the data compressing means 13, to be compressed.

Claims8

Dependent claims

An image processing apparatus, in which preprocessed image data is inputted in every frame, and subjected to predetermined processing for outputting, and the processed image data is outputted in every frame, the apparatus comprising:

reference data generating means for generating reference data one time in one term made up of not less than two consecutive frames, and also outputting specific reference data in every frame;
data compressing means for performing compression processing on the reference data one time in the one term, to generate compressed reference data;
a memory for storing the compressed reference data;
data expanding means for performing expansion processing on the compressed reference data stored in the memory, to generate restored reference data in every frame;
and
output image data generating means for generating the processed image data based on the specific reference data and the preprocessed image data,
wherein
the reference data generating means is configured to repeatedly execute the same processing in each term,
in a first frame in the term the reference data generating means outputs as the specific reference data the restored reference data generated by the data expanding means based on the compressed reference data stored in the memory, to the output image data generating means,
in an intermediate frame other than the first frame and a final frame in the term, the reference data generating means outputs the specific reference data generated on the basis of the restored reference data generated by the data expanding means based on the compressed reference data stored in the memory and the preprocessed image data of the intermediate frame, to the output image data generating means, and,
in the final frame in the term, the reference data generating means outputs the specific reference data generated on the basis of the restored reference data generated by the data expanding means based on the compressed reference data stored in the memory and the preprocessed image data of the final frame, to the output image data generating means, and also generates the reference data based on the specific reference data and the preprocessed image data of the final frame, to output the generated data to the data compressing means, and the data compressing means compresses the reference data.

8 more elements

An image processing method, in which preprocessed image data inputted in every frame is subjected to predetermined processing for outputting, and the processed image data is outputted in every frame, the method comprising:

a reference data generating step for generating reference data one time in one term made up of not less than two consecutive frames;
a specific reference data generating step for generating specific reference data in every frame;
a reference data compressing step for performing compression processing on the reference data one time in the one term, to generate compressed reference data;
a memory step for storing the compressed reference data into a memory;
a data expanding step for performing expansion processing on the compressed reference data stored in the memory, to generate restored reference data;
and
an output image data generating step for generating the processed image data based on the specific reference data and the preprocessed image data,
wherein
in a first frame in the term, in the specific reference data generating step, the restored reference data generated in the data expanding step based on the compressed reference data stored in the memory is generated as the specific reference data,
in an intermediate frame other than the first frame and a final frame in the term, in the specific reference data generating step, the specific reference data is generated on the basis of the restored reference data generated in the data expanding step based on the compressed reference data stored in the memory and the preprocessed image data of the intermediate frame, and
in the final frame in the term, in the specific reference data generating step, the specific reference data is generated on the basis of the restored reference data generated in the data expanding step based on the compressed reference data stored in the memory and the preprocessed image data of the final frame, and in the reference data generating step, the reference data is generated based on the specific reference data and the preprocessed image data of the final frame.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/990,908Filed 4 Nov 2011
Priority: JP 2010-2687721 Dec 2010
Published: US 2013/0243345 A119 Sep 2013
Granted: 27 Jan 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G06T 9/00
Image coding
G09G 5/393
Control of the bit-mapped memory: arrangements for updating the contents of the bit-mapped memory
G09G 5/395
Control of the bit-mapped memory: arrangements specially adapted for transferring the contents of the bit-mapped memory to the screen
H04N 19/428
Using memory downsizing methods: recompression, e.g. by spatial or temporal decimation